Device for driving warp beam in looms

ABSTRACT

Device for driving coaxially mounted warp beams in looms, said warp beams being disposed transversely in said looms and driven by one differential gearing mechanism. The device has the advantages of a differential drive upon using two warp beams, and does not include excessive elements upon using a full width warp beam. The tubular warp beam situated near the differential gear box is connected to a first driving element of said gear box and is provided within its tube with a connecting rod for the second warp beam, said rod being provided with a driving lug for connection to the second driving element of said gear-box.

United States Patent Svaty et al.

DEVICE FOR DRIVING WARP BEAM IN LOOMS Inventors: Vladimir Svaty; Miloslav Otta, both of Liberec, Czechoslovakia Elitex, Zavody textilniho strojirenstvi generalni reditelstvi, Liberec, Czechoslovakia Filed: July 16, 1974 Appl. No.: 489,054

Assignee:

Foreign Application Priority Data July 16, 1973 Czechoslovakia 5074-73 US. Cl 139/101; 139/97; 74/665 K Int. Cl. D03C 49/06 Field of Search 139/97, 101, 109; 28/39;

2,617,447 11/1952 Kiessling 139/97 2,908,187 10/1959 Saari 74/665 K 3,534,779 lO/l970 Matouch 139/101 Primary ExaminerMervin Stein Assistant Examiner-Steven Hawkins ABSTRACT Device for driving coaxially mounted warp beams in looms, said warp beams being disposed transversely in said looms and driven by one differential gearing mechanism. The device has the advantages of a differential drive upon using two warp beams, and does not include excessive elements upon using a full width warp beam. The tubular warp beam situated near the differential gear box is connected to a first driving element of said gear box and is provided within its tube with a connecting rod for the second warp beam, said rod being provided with a driving lug for connection to the second driving element of said gear-box.

6 Claims, 2 Drawing Figures US. Patent Oct. 28, 1975 Sheet 1of2 3,915,198

US. Patent Oct.28, 1975 Sheet2of2 3,915,198

DEVICE FOR DRIVING WARP BEAM IN LOOMS The present invention relates to a device for driving warp beams in looms with one gear mechanism, said warp beams being disposed in coaxial arrangement transversely of said looms.

In looms of larger width, warp beams are used either of the one part, full width type, or two warp beams mounted one beside one another.

When using two warp beams, differential gears are used for the purpose of an even distribution of the driving force. However, the common disadvantage of said differential gears consists in that the transmission of the force to the remote warp beam is rather complicated, since an independent shaft mounted along the whole width of the loom has been required. However, this in dependent shaft and all its appurtenant accessories such as bearings, pinions and similar parts are useless when a full width warp beam is used.

The present invention has among its objects the provision of such a device which has all the advantages of a differential drive when using two warp beams, and which does not require further excessive elements when a full width warp beam is used. In accordance with the present invention, the hollow warp beam being situated nearer the gear box or gear mechanism is connected to one driving element of said gear box, and is provided within its tube with a connecting rod for the second warp beam, said rod being provided with a driving lug for connecting it to the second driving element of said gear box.

Further advantages and features of the present invention are disclosed in the following specification of the device of the present invention and shown in the accompanying drawings, in which:

FIG. 1 is a view in longitudinal section through the differential drive housing and two coaxially mounted warp beams on a loom (not shown); and

FIG. 2 is a view in longitudinal section through the differential drive housing and mechanism for connecting the inner driving element of the differential housing to the connecting rod for the remote warp beams.

As shown in FIG. 1, the side frame member 1 of the weaving loom there fastened a differential gear box 2. Gear box 2 comprises a driving worm 3 which is in mesh with a worm wheel 4. At least two planet wheels 5 are mounted in worm wheel 4 by means of which the driving force from worm 3 is evenly distributed between crown gears 6 and 7 which mesh with planet wheels 5.

As shown in FIG. 2, crown gear 6 is connected by a key 6a to a shaft 9 which is journalled for free rotation by means of sleeve bearings 8; the hub 10 of gear 7 is attached to a sleeve 12 by means ofa key 11. Sleeve 12 forms the outer coaxial element of differential gear mechanism or gear box 2. Sleeve 12 is further connected at its left end to a sleeve 13 (FIG. 1) mounted rotatably in a fixed bed 14, a first warp beam 15 being driven by said sleeve 13, the tube 16 of warp beam 15 being mounted at its other, right end, rotatably in a fixed holder 17 which is mounted in the transverse center of the loom (not shown).

The second crown gear 6 is fixedly mounted on shaft 9, which is mounted for free rotation on the axis of the differential gear box 2 and forms e.g. the inntr coaxial driving element.

At its right end 18 (FIG. 2) shaft 9 has an axially displaceable sleeve 19 telescoped thereover; the end 18 of shaft 9 and the mating inner profile of sleeve 18 are of a non-circular cross-section, e.g. a square crosssection. The end 18 of shaft 9 is further longitudinally slotted and in the slot 18a thus formed there is mounted a transverse pin 20 which is affixed in axially displaceable sleeve 19.

A rod 21 is fixedly connected to pin 20, said tie rod passing through an axial bore in shaft 9 to a position at the left beyond the differential gear box 2, where it is threaded at joint 22 and receives a nut 23 which is turned by means of a crank 24.

At its right hand end (FIG. 2) the displaceable sleeve 19 has an inner profile corresponding in scope to a driving lug 25 at the left of a connecting rod 26 which is mounted for free rotation by means of openings in partitions 27 in the space of tube 16 of warp beam 15. The right end of connecting rod 26 has a driving lug 28 which drivingly engages the modified opening of e.g. square shape in the partition 29 of the second (right) warp beam 30 and provides for the transmission of driving force from the inner coaxial driving member of a differential gear box via shaft 9.

The warp beam 30 is rotatably fastened in affixed at its left end holder 17 by means of a journal sleeve 31 at the other side of frame member 32 of the loom.

The device according to the present invention operates as follows:

When mounting both warp beams 15 and 30 in the loom, warp beam 30 is fastened first and connecting rod 26 is inserted into warp beam 15 before its mounting in the loom in such manner that none of its driving lugs 25 and 28 driving engages the ends of tube 16 of said warp beam 15. Thereafter, beam 15 is inserted into the holder 17 and bed 14. Crank 24 of nut 23 is then turned in such manner, that tie rod 21 is displaced to the right, that is, threaded end 22 of tie rod 9 is moved inside the differential gear box 2 by a coil compression spring 33 acting in the said direction (to the right) upon the axially displaceable sleeve 19. The said axially displaceable sleeve 19 is now slid onto or bears against the front of driving lug 25 on connecting rod 26. In order to slide the said axially displaceable sleeve 19 correctly on driving lug 25 and to make the other driving lug 28 on connecting rod 26 engage the opening in partition 29, a slight turning of the remote warp beam may possibly have to be performed.

After perfect engagement of said driving lugs 25 and 28 into the openings in partition 29 and in the axially displaceable sleeve 19, the complete displacement of the axially displaceable sleeve 19 is finished by means of crank 24, its nut 23 and spring 33, spring loaded ball 34 at the right hand end of the said sleeve 19 thereupon engaging a circumferential groove 35 on driving lug 25 of connecting rod 26 for a purpose to be explained below:

Upon finishing the operations described above, the two warp beams 15 and 30 are mounted in the loom, said warp beam 15 situated nearer the differential gear box 2 being connected with an outer coaxial driving member of said gear box, i. e. sleeve 12, and the other, further warp beam 30 being connected by connecting rod 26 to the inner coaxial driving member of said gear box 2, i.e. to shaft 9 via the axially displaceable sleeve 19 arranged thereon.

Upon removing warp beam 15, crank 24 is turned in the opposite direction, the axially displaceable sleeve 19 being shifted to the left inside gear box 2 by means of tie rod 21 and pin 20. Upon this motion of the axially displaceable sleeve 19, connecting rod 26 begins to be displaced axially to the engagement of the spring loaded ball 34 with the circumferential groove on driving lug 25, permiting such movement, until the end of its driving lug 25 engages the front end' 36 of shaft 9, the other driving lug 28 of connecting rod 26 being then removed from the opening in partition 29 of warp beam 30.

Upon further displacement to the left of the axially displaceable sleeve 19, that is, in the direction toward the differential gear box 2, said spring loaded ball 34 escapes completely from the circumferential groove 35 on driving lug 25 of connecting rod 26, and the warp beam can be removed on connecting rod 26 from the loom.

The specification as given above is intended only for better understanding of the present invention and it is obvious to those skilled in the art that the device according to the present invention, as described above, may be modified in variousmanners, particularly as far as the coaxial members 9, l9 and 12 of the differential gear box 2 and the elements attached thereto are concerned.

Although the invention is illustrated and described with reference to one preferred embodiment thereof, it is to be expressly understood that it is in no way limited to the disclosure of such a preferred embodiment, but is capable of numerous modifications within the scope of the appended claims.

What is claimed is:

l. A device for driving coaxially mounted tubular warp beams in looms, said beams being mounted transversely of a loom and driven by a single differential gear box at one end of the aligned beams, comprising means connecting the first warp beam, situated nearer the gear box, an axially extending connecting rod for a second warp beam connected to one driving member of the gear box and extending through the space within the first warp beams, the connecting rod and the second warp beam being provided with interfitting driving formations, one driving member being provided with an axially displaceable sleeve which is controllable from outside the gear box and has a non-circular crosssection which corresponds in shape to the driving lug at the end of the connecting rod for driving second warp beam, a tie rod passing axially through the driving member, the axially displaceable sleeve being connected to the tie rod, the tie rod being threaded on its outer free end and a moving nut mounted thereon, the rod being connected at its other end of the sleeve by means of a pin mounted transversely in a slot in the end of the driving member.

2. A device as claimed in claim 1, wherein the axially displaceable sleeve is provided at its end engaging the connecting rod with a pawl mechanism cooperating with a circumferential groove on the driving formation of the connecting rod.

3. A device as claimed in claim 2, comprising a spring which biases and loans the axially displaceable sleeve.

4. A device as claimed in claim 3, wherein the crosssection of the driving formation on the connecting rod for the second warp beam and for its connection with the axially displaceable sleeve is square-shaped.

5. A device as claimed in claim 4, wherein the second tubular warp beam is provided in the space within its tube with a partition having an opening for receiving the lug of said connecting rod.

6. A device as claimed in claim 5, wherein the length of the connecting rod does not exceed the length of the tube of the first warp beam in which said rod is mounted. 

1. A device for driving coaxially mounted tubular warp beams in looms, said beams being mounted transversely of a loom and driven by a single differential gear box at one end of the aligned beams, comprising means connecting the first warp beam, situated nearer the gear box, an axially extending connecting rod for a second warp beam connected to one driving member of the gear box and extending through the space within the first warp beams, the connecting rod and the second warp beam being provided with interfitting driving formations, one driving member being provided with an axially displaceable sleeve which is controllable from outside the gear box and has a non-circular cross-section which corresponds in shape to the driving lug at the end of the connecting rod for driving second warp beam, a tie rod passing axially through the driving member, the axially displaceable sleeve being connected to the tie rod, the tie rod being threaded on its outer free end and a moving nut mounted thereon, the rod being connected at its other end of the sleeve by means of a pin mounted transversely in a slot in the end of the driving member.
 2. A device as claimed in claim 1, wherein the axially displaceable sleeve is provided at its end engaging the connecting rod with a pawl mechanism cooperating with a circumferential groove on the driving formation of the connecting rod.
 3. A device as claimed in claim 2, comprising a spring which biases and loads the axially displaceable sleeve.
 4. A device as claimed in claim 3, wherein the cross-section of the driving formation on the connecting rod for the second warp beam and for its connection with the axially displaceable sleeve is square-shaped.
 5. A device as claimed in claim 4, wherein the second tubular warp beam is provided in the space within its tube with a partition having an opening for receiving the lug of said connecting rod.
 6. A device as claimed in claim 5, wherein the length of the connecting rod does not exceed the length of the tube of the first warp beam in which said rod is mounted. 